From nobody Wed Feb 11 06:15:34 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass(p=none dis=none) header.from=nongnu.org ARC-Seal: i=1; a=rsa-sha256; t=1697115467; cv=none; d=zohomail.com; s=zohoarc; b=Ya56lFBS5dJNeVd1ivfOh+tWlMKcFzfOnddlsP3FuD4FFmJwwrFJD/V3bW+xFlyTE+gkY7PZljpvFb4wrFAIs5OfeRS4NVIJ3s6RnehHkXZ2TYi9GO5PlcG2nFmgk81veKKIVIpFFlpskqD6hG1XhsxDtTj4T84TPEqu2vrWZp0= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1697115467; h=Content-Type:Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:Reply-To:Reply-To:References:Sender:Subject:Subject:To:To:Message-Id; bh=I3l5Z9Kq2LP/xNp2QYQQIivT3EoSSvF9DlRaPo7cwxw=; b=I4/VNBfWsvTZf88EHc718EtYIA4U7TVxULHGdwV9MfH2bTJ5eChv1vWbjQPE1AGEozCFm/QywjybUMDmpF/6LPdAjZHHmdbe7T+yRvieEz7TZLDvghd68Y09chy9SrepOJHIn6HPqYxk+oehiJlmkBz//UcaJHpCdPvpHupFS0E= ARC-Authentication-Results: i=1; mx.zohomail.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass header.from= (p=none dis=none) Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1697115467063612.5030664629321; Thu, 12 Oct 2023 05:57:47 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qqvFu-0005O7-4N; Thu, 12 Oct 2023 08:57:35 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qqvFl-0005L8-7y for qemu-devel@nongnu.org; Thu, 12 Oct 2023 08:57:26 -0400 Received: from frasgout.his.huawei.com ([185.176.79.56]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qqvFh-00031K-TT for qemu-devel@nongnu.org; Thu, 12 Oct 2023 08:57:23 -0400 Received: from lhrpeml500005.china.huawei.com (unknown [172.18.147.226]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4S5qMn3GTbz6J9X5; Thu, 12 Oct 2023 20:54:13 +0800 (CST) Received: from SecurePC-101-06.china.huawei.com (10.122.247.231) by lhrpeml500005.china.huawei.com (7.191.163.240) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.31; Thu, 12 Oct 2023 13:57:19 +0100 To: , , Michael Tsirkin CC: , Fan Ni , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , Subject: [PATCH v5 2/3] hw/cxl: Add QTG _DSM support for ACPI0017 device Date: Thu, 12 Oct 2023 13:56:22 +0100 Message-ID: <20231012125623.21101-3-Jonathan.Cameron@huawei.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20231012125623.21101-1-Jonathan.Cameron@huawei.com> References: <20231012125623.21101-1-Jonathan.Cameron@huawei.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Originating-IP: [10.122.247.231] X-ClientProxiedBy: lhrpeml100002.china.huawei.com (7.191.160.241) To lhrpeml500005.china.huawei.com (7.191.163.240) X-CFilter-Loop: Reflected Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=185.176.79.56; envelope-from=jonathan.cameron@huawei.com; helo=frasgout.his.huawei.com X-Spam_score_int: -41 X-Spam_score: -4.2 X-Spam_bar: ---- X-Spam_report: (-4.2 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_MED=-2.3, RCVD_IN_MSPIKE_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-to: Jonathan Cameron From: Jonathan Cameron via Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZM-MESSAGEID: 1697115468202100001 Content-Type: text/plain; charset="utf-8" From: Dave Jiang Add a simple _DSM call support for the ACPI0017 device to return fake QTG ID values of 0 and 1 in all cases. This for _DSM plumbing testing from the = OS. Following edited for readability Device (CXLM) { Name (_HID, "ACPI0017") // _HID: Hardware ID ... Method (_DSM, 4, Serialized) // _DSM: Device-Specific Method { If ((Arg0 =3D=3D ToUUID ("f365f9a6-a7de-4071-a66a-b40c0b4f8e52"))) { If ((Arg2 =3D=3D Zero)) { Return (Buffer (One) { 0x01 }) } If ((Arg2 =3D=3D One)) { Return (Package (0x02) { One, Package (0x02) { Zero, One } }) } } } Signed-off-by: Dave Jiang Signed-off-by: Jonathan Cameron --- v5: No change - picked up Dave's V4 posting to wrap with tests. include/hw/acpi/cxl.h | 1 + hw/acpi/cxl.c | 69 +++++++++++++++++++++++++++++++++++++++++++ hw/i386/acpi-build.c | 1 + 3 files changed, 71 insertions(+) diff --git a/include/hw/acpi/cxl.h b/include/hw/acpi/cxl.h index acf4418886..8f22c71530 100644 --- a/include/hw/acpi/cxl.h +++ b/include/hw/acpi/cxl.h @@ -25,5 +25,6 @@ void cxl_build_cedt(GArray *table_offsets, GArray *table_= data, BIOSLinker *linker, const char *oem_id, const char *oem_table_id, CXLState *cxl_state); void build_cxl_osc_method(Aml *dev); +void build_cxl_dsm_method(Aml *dev); =20 #endif diff --git a/hw/acpi/cxl.c b/hw/acpi/cxl.c index 92b46bc932..9cd7905ea2 100644 --- a/hw/acpi/cxl.c +++ b/hw/acpi/cxl.c @@ -30,6 +30,75 @@ #include "qapi/error.h" #include "qemu/uuid.h" =20 +void build_cxl_dsm_method(Aml *dev) +{ + Aml *method, *ifctx, *ifctx2; + + method =3D aml_method("_DSM", 4, AML_SERIALIZED); + { + Aml *function, *uuid; + + uuid =3D aml_arg(0); + function =3D aml_arg(2); + /* CXL spec v3.0 9.17.3.1 _DSM Function for Retrieving QTG ID */ + ifctx =3D aml_if(aml_equal( + uuid, aml_touuid("F365F9A6-A7DE-4071-A66A-B40C0B4F8E52"))); + + /* Function 0, standard DSM query function */ + ifctx2 =3D aml_if(aml_equal(function, aml_int(0))); + { + uint8_t byte_list[1] =3D { 0x01 }; /* function 1 only */ + + aml_append(ifctx2, + aml_return(aml_buffer(sizeof(byte_list), byte_list)= )); + } + aml_append(ifctx, ifctx2); + + /* + * Function 1 + * Creating a package with static values. The max supported QTG ID= will + * be 1 and recommended QTG IDs are 0 and then 1. + * The values here are statically created to simplify emulation. V= alues + * from a real BIOS would be determined by the performance of all = the + * present CXL memory and then assigned. + */ + ifctx2 =3D aml_if(aml_equal(function, aml_int(1))); + { + Aml *pak, *pak1; + + /* + * Return: A package containing two elements - a WORD that ret= urns + * the maximum throttling group that the platform supports, an= d a + * package containing the QTG ID(s) that the platform recommen= ds. + * Package { + * Max Supported QTG ID + * Package {QTG Recommendations} + * } + * + * While the SPEC specified WORD that hints at the value being + * 16bit, the ACPI dump of BIOS DSDT table showed that the val= ues + * are integers with no specific size specification. aml_int()= will + * be used for the values. + */ + pak1 =3D aml_package(2); + /* Set QTG ID of 0 */ + aml_append(pak1, aml_int(0)); + /* Set QTG ID of 1 */ + aml_append(pak1, aml_int(1)); + + pak =3D aml_package(2); + /* Set Max QTG 1 */ + aml_append(pak, aml_int(1)); + aml_append(pak, pak1); + + aml_append(ifctx2, aml_return(pak)); + } + aml_append(ifctx, ifctx2); + } + aml_append(method, ifctx); + aml_append(dev, method); +} + static void cedt_build_chbs(GArray *table_data, PXBCXLDev *cxl) { PXBDev *pxb =3D PXB_DEV(cxl); diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c index 3f2b27cf75..019aa71525 100644 --- a/hw/i386/acpi-build.c +++ b/hw/i386/acpi-build.c @@ -1422,6 +1422,7 @@ static void build_acpi0017(Aml *table) method =3D aml_method("_STA", 0, AML_NOTSERIALIZED); aml_append(method, aml_return(aml_int(0x01))); aml_append(dev, method); + build_cxl_dsm_method(dev); =20 aml_append(scope, dev); aml_append(table, scope); --=20 2.39.2